Платформа ЦРНП "Мирокод" для разработки проектов
https://git.mirocod.ru
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
51 lines
1019 B
51 lines
1019 B
// Copyright 2011 Evan Shaw. All rights reserved. |
|
// Use of this source code is governed by a BSD-style |
|
// license that can be found in the LICENSE file. |
|
|
|
// +build darwin dragonfly freebsd linux openbsd solaris netbsd |
|
|
|
package mmap |
|
|
|
import ( |
|
"golang.org/x/sys/unix" |
|
) |
|
|
|
func mmap(len int, inprot, inflags, fd uintptr, off int64) ([]byte, error) { |
|
flags := unix.MAP_SHARED |
|
prot := unix.PROT_READ |
|
switch { |
|
case inprot© != 0: |
|
prot |= unix.PROT_WRITE |
|
flags = unix.MAP_PRIVATE |
|
case inprot&RDWR != 0: |
|
prot |= unix.PROT_WRITE |
|
} |
|
if inprot&EXEC != 0 { |
|
prot |= unix.PROT_EXEC |
|
} |
|
if inflags&ANON != 0 { |
|
flags |= unix.MAP_ANON |
|
} |
|
|
|
b, err := unix.Mmap(int(fd), off, len, prot, flags) |
|
if err != nil { |
|
return nil, err |
|
} |
|
return b, nil |
|
} |
|
|
|
func (m MMap) flush() error { |
|
return unix.Msync([]byte(m), unix.MS_SYNC) |
|
} |
|
|
|
func (m MMap) lock() error { |
|
return unix.Mlock([]byte(m)) |
|
} |
|
|
|
func (m MMap) unlock() error { |
|
return unix.Munlock([]byte(m)) |
|
} |
|
|
|
func (m MMap) unmap() error { |
|
return unix.Munmap([]byte(m)) |
|
}
|
|
|